Free manualsOpen-field climate emergency manualFree guide divided into 3 climates (cold, temperate, and hot): what to do in the worst-case scenario for each one, from the most expensive professional solution to the cheapest rustic hack you can put together today.Origin: Yolia LibraryExact route: /biblioteca?ruta=manuales/manual-de-emergencias-en-campo-abierto FULL TOPICOpen-field climate emergency manual Cold climate — worst case: black frost Black frost happens when the temperature drops suddenly on a clear, windless night, freezing the water inside plant tissue without any visible frost forming — that's why it's the most dangerous, it fools the naked eye. Professional solution (more expensive): anti-frost wind towers, which mix the cold air stuck at ground level with the warmer air from the layers above, preventing the temperature next to the plant from dropping below the critical point. Rustic hack (cheaper): smoke blankets made by slowly and controlledly burning dry manure in drums around the crop — the dense smoke forms a layer that traps the soil's little remaining heat overnight, just like an improvised thermal blanket. Clima Templado — peor escenario: granizo Hail strikes foliage, stems, and fruit directly with mechanical impact, and can destroy in minutes what took weeks to grow. Professional solution (more expensive): automated retractable anti-hail nets, which deploy on their own when the system detects the storm and retract afterward so they don't block light the rest of the time. Rustic hack (cheaper): build a makeshift structure with PVC pipes as a frame and common netting stretched over it — it's not automatic, but if you see the storm coming, you can deploy it by hand in minutes and protect against the direct impact. Warm climate — worst case: heat stress Heat combined with high solar radiation dehydrates the plant faster than its roots can replenish water, and can burn directly exposed tissue. Professional solution (more expensive): active shading or misting systems that lower leaf temperature in real time. Rustic hack (cheaper): botanical whitewashing — dilute white kaolin clay in water and apply it as a thin layer over exposed leaves and fruit; it acts as a natural sunblock, reflecting part of the radiation before it heats the tissue, and can be washed off later with water once it's no longer needed. Related topicsClimate EngineRoot flushing (soil flushing)